/// <summary>
/// 鼠标按下事件的处理函数
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void OnMouseDown(int button, double mapX, double mapY)
{
//窗体对象如果已经释放则不做任何操作
if (IsDisposed) return;
//必须是左键按下
if (button != 1) return;
//显示当前点击位置
DisplayCoordinates(mapX, mapY);
//开始画框操作
IPoint mouseDownPoint = new PointClass();
mouseDownPoint.PutCoords(mapX, mapY);
mouseDownPoint.SpatialReference = associateMapControl.SpatialReference;
if (trackNewEnvelope == null)
{
//新建框选对象
trackNewEnvelope = new NewEnvelopeFeedbackClass();
trackNewEnvelope.Display = associateMapControl.ActiveView.ScreenDisplay;
trackNewEnvelope.Start(mouseDownPoint);
}
}
/// <summary>
/// 鼠标弹起的事件处理
/// </summary>
public void OnMouseUp(double mapX, double mapY)
{
//必须在画框的过程中才调用鼠标弹起函数
if (trackNewEnvelope == null) return;
//显示当前位置
DisplayCoordinates(mapX, mapY);
//完成画框操作，获取矩形框/点
identifyEnvelope = trackNewEnvelope.Stop();
if (identifyEnvelope.IsEmpty)
{
IPoint mouseUpPoint = new PointClass();
mouseUpPoint.PutCoords(mapX, mapY);
mouseUpPoint.SpatialReference = associateMapControl.SpatialReference;
identifyEnvelope = mouseUpPoint;
}
identifyEnvelope.SpatialReference = associateMapControl.SpatialReference;
//置空对象
trackNewEnvelope = null;
//获取查询图层
List<LayerFilterProperties> searchLayers = SearchIdentifyLayers();
//没有图层时不进行任何操作返回
if (searchLayers == null || searchLayers.Count < 1) return;
//显示查询信息
lblFeatureCount.Text = "正在查询...";
Application.DoEvents();
//对需查询的图层执行查询操作
ExecuteIdentify(searchLayers, identifyEnvelope);
//显示查询结果
DisplayIdentifyResults();
//闪烁查询到的结果
flashObjects.FlashObjects();
}
/// <summary>
/// 鼠标按下事件的处理函数
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
//窗体对象如果已经释放则不做任何操作
if (IsDisposed) return;
//必须是左键按下
if (e.button != 1) return;
//显示当前点击位置
DisplayCoordinates(e.mapX, e.mapY);
//开始画框操作
IPoint mouseDownPoint = new PointClass();
mouseDownPoint.PutCoords(e.mapX, e.mapY);
mouseDownPoint.SpatialReference = pAxMapControl.SpatialReference;
if (trackNewEnvelope == null)
{
//新建框选对象
trackNewEnvelope = new NewEnvelopeFeedbackClass();
trackNewEnvelope.Display = pAxMapControl.ActiveView.ScreenDisplay;
trackNewEnvelope.Start(mouseDownPoint);
}
}
